Cutting means for parquetry block machines



March '10, 1953 c. E. TI'BBALS CUTTING MEANS FOR PARQUETRY BLOCK MACHINES 2 SHEETS-SHEET 1 Filed Oct. 8, 1951 INVENTOR.

BY W

Charles E Tbba/s Marh '10, 1953 c. E. T-IBBALS CUTTING MEANS FOR PARQUETRY BLOCK MACHINES Filed 001;. 8, 1951 2 SHEETSSHEET 2 Char/es E. T/bba/S INVENTOR.

Patented Mar. 10, 1953 UNITED STATES IATENT OFFICE 'CUTTIN'G MEAN S FGR PARQUETRY BL'OGK MACHINES 6 Claims.

My invention relates to improvements in means for cutting away the tongues at one corher of pieces of'tongue and groove flooring as the same are being formed into parquetry bloeks in the'machine of my co-pendingapplica'tion Serial No. 141,557, filed Januaryfil, 1950, and of which the instant application forms a continuationin part. 7 e 7 By way of premise, in the machine of my copending application, short pieces of tongue and groove flooring are placed one behind the other in block formation in the machine with the tongues and grooves fitting together and are fed forwardly over the bed of the machine by a reciprocating pusher bar "the. 'splinin'g mechanism for connecting together the pieces necessary to form a parquetry block.

The primary object of the instant invention is to provide in such a machine, cutter means automatically operative as an incident to recipro'cation of the pusher bar to cut off the corners of the tongues at one end of the rear piece for-each block so that said corner will not interfere with laying of the blocks corner to corner in the usual manner.

Another object is to provide in such cutting means for automatically timing operation thereof so that it will operate as the pusher bar feeds the blocks forwardly so that the feeding and cutting are accomplished simultaneously to obviate separate feeding and cutting operations.

Another object is to provide cutting means for the purpose specified which is simple in construction and forms an attachment for the machine easily installed and inexpensive to manufacture and service.

Other and subordinate objects, within the purview of my invention, together with the precise nature of my improvements will be readily understood when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this specification.

In said drawings:

Figure 1 is a fragmentary view in plan illustrating my improved cutter means attached to the machine;

Figure 2 is an enlarged detail view in transverse section taken on the line 2-2 of Figure 1 with parts eliminated, to avoid confusion in the illustration Figure 3 is a fragmentary view in plan partly in section of the same;

Figure 4 is a similar view illustrating the operation of the cutter means;

Figure 5 is a view in longitudinal section taken on the line 5-5 of Figure 3; and

Figure 6 is a view in side elevation of the bracket on whichthe cutter member is pivoted.

Referring now to the drawings by numerals, the machine for'which my improved cutter-means is especially designedpand whichisshown fragmentarily as sufiicient "for the present purposes, comprises a bed-or top "5 supported byend legs, as at 6, and provided adjacent one end thereof with a longitudinal central slot 1 and apair of longitudinal-guide rails 8 at opposite sides of the slot 1 for a purpose presently apparent. A pusher bar 9 extends transversely of the slot l and is slidable longitudinallyoverthebed-5 between the guide rails 8. A bottom guide rib 10-.on the pusher bar 9 slides in the slot Landabottom keeper plate H on the rib [Bis secured to said rib [0 by bolts I2 and underlaps-the'edges of the slot 1 to retain said bar 9 on the bed 5.

The pusher 5 is reciprocated by adouble-acting hydraulic motor I4 including a cylinder I5 mounted by supportingmembers I6 in the slot 1 with a piston l3 suitably fixed to said pusher bar to reciprocate the same with forward and return strokes away fromand toward'said end of the bed 5, respectively. A piston valve unit 18 connected to opposite ends of the cylinder 15 by lines i5, 25 controls feed of hydraulic pressure through said lines !9, 20 to said cylinder from a source of hydraulic pressure including a pump driven by the drive means 2|, said source and pump not being shown as the same form, per se, no part of the instant invention.

A rotary cam groove disk 28 operating a pivoted lever 30 connected tothe valve unit piston 3| operates said valve unit, the disk 28 being driven by a motor 31 on one side of the bed 5 operatively connected to said disk by a drive designated as a unit by the numeral 38.

The pieces of flooring S are placed in sets in tongue and groove engagement, one behind the other, on the bed 5 in front of the pusher bar 9, three pieces, in this instance, forming a block, and are fed forwardly over the bed 5 between the guide rails 8 beneath hold-down rails I6 and hold-down dogs 51, to the before-mentioned spline mechanism not disclosed herein since the same is not essential to a proper understanding of this invention. A tongue 39 of the rear piece S of each set seats in a longitudinal front edge slot 40 in the pusher bar 9.

Bolted, as at 48, to one end of the pusher bar 9 is a bracket 49 extending outwardly of said bar over the adjacent guide rail 8. An oscillating cutter member 50 with an arcuate inner end 50' facing said end of the pusher bar 9 is pivoted intermediate its ends, by a vertical bolt 5|, to the underside of said bracket, said end being concentric to the bolt 5|.

An adjustable abutment bar 52 is bolted, as at 53, on one guide rail It in a position to be engaged by the outer end 54 of the cutter member 56 as the pusher bar 9 nears the end of its forward stroke, whereby to swing said end 50 of the cutter member 50 forwardly of said bar 9 in an arcuate path. An arcuate cutter blade 55 with a sharp front end 55 is welded, as at 51, in a groove 58 in the inner end 58 of the cutter member 50, said blade 55 working in an end slot 59 in the adjacent end of the pusher bar 9. As the inner end 50 of said cutter member 50 swings forwardly, the cutter blade 55 cuts the corner of the adjacent end of the tongue 39 of the rear piece, or slat S. The cutter member 50 is welded, as at 60, to its pivot bolt 51 and said bolt has threaded on its upper end a crank arm 5! to which one end of a coil spring 62 is fastened with its other end fast to a lug 63 on one of the bolts 48, the arrangement being such that said spring 52 and arm 51, when the pusher bar 9 is retracted, swing the cutter memher 53 to a normal starting position in which a stop pin 64 on the bracket 49 engages blade 55.

The foregoing will, it is believed, sufiice to impart a clear understanding of my cutter means, since the operation thereof has been set forth in the foregoing in connection with a description of the construction thereof.

Manifestly, the invention, as defined, is susceptible of modification, without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. In a parquetry block machine, mechanism for intermittently feeding forwardly tongue and groove flooring pieces with said pieces transverse to the direction of feed and the tongue of one piece positioned rearwardly, said mechanism including a reciprocating pusher bar having a forward stroke of movement, a cutter member carried by said pusher bar and pivoted thereon for swinging movement in one direction to cut a corner off said tongue, and means on said ma chine engaged by said member during forward movement of said bar to cause swinging movement of said member in said direction.

2. In a parquetry block machine according to claim 1, wherein said pusher bar is provided with an edge slot receiving said tongue during cutting of said corner.

3. In a parquetry block machine according to claim 1, wherein said means comprises an abutment on said machine.

4. In a parquetry block machine according to claim 1, wherein said pusher bar is provided with an end slot in which said cutter member swings.

5. In a parquetry block machine according to claim 1, wherein said member is pivoted intermediate its ends with one end engageable with said means and its other end provided with an arcuate cutter blade having a pointed cutting end.

6. In a parquetry block machine according to claim 5 wherein said cutter member is fast on said pivot and said pivot is rotatable, and spring means tensioning said pivot against rotation to yieldingly restrain said pivot against rotation and said member against swinging.

CHARLES E. TIBBALS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 746,807 Ferres Dec. 15, 1903 897,344 Bray et al Sept. 1, 1908 944,555 Holden Dec. 28, 1909 2,247,723 Chial July 1, 1941 2,440,799 Herick May 4, 1948 2,446,994 Barker Aug. 1'7, 1948 

